On Lord Lindsay's Preparations for Observations of the Transit of Venus, 1874

40 feet focus accidental errors Alidade circles axis change of irradiation chronograph barrel co-operation collimator piers complete for Lord Dallmeyer DAVID GILL Delisle's methods diameter of Venus distance from limb distance of centres double image Dunecht Effect of change eliminate any error equatoreal mounting errors of division eye end favourable fiducial lines geographical position halves helio heliometer heliometric method Heliostat inches aperture instants of exposure instrument intends to send internal contact Lake Baikal least centres least distance lens Lord Lindsay LORD LINDSAY'S PREPARATIONS Mauritius measures Messrs method of observation micrometer microscopes mirrors Monthly Notices object-glass Observatory obtained periodic or accidental Photographic Methods planet position angles PREPARATIONS FOR OBSERVATIONS probable error Professor Winlock's refer the Fellows refractor repeat the series Repsold rotated Royal Astronomical Society scale second of arc semi-lenses Siderostat spectroscope Sun's diameter telescope temperature Transit of Venus transit-circle undertaken to complete Wolf's description zero of position zero point